The molar absorptivity () of benzoic acid at 228 nm? assume that the path length is 1. 00 cm is = 11178 M-1. cm-1
We are given, absorbance spectrum and from that the absorbance of benzoic acid at 228 nm
Absorbance = 0.8
Now we need to calculate the molar absorptivity of benzoic acid at 228 nm
We know at the 228 nm the A = 0.8 and C = 8.74 mg/L.
We also given the l = 1 cm
Moles of benzoic acid = 0.00874 g / 122.12 g.mol-1
= 7.16*10-5 moles
So, C of benzoic acid = 7.16*10-5 moles / L
We know the
ε = A/C*l
= 0.80 / 7.16*10-5 M. 1 cm
= 11178 M-1. cm-1
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